public class e5 {
        public static void main(String[] args) {
            String s1 = "String";
            String s2 = "Str";
            System.out.println("判断是否以字符串Str开头:" + s1.startsWith("Str"));
            System.out.println("判断是否以字符串ng结尾:" + s1.endsWith("ng"));
            System.out.println("判断是否包含字符串tri:" + s1.contains("tri"));
            System.out.println("判断字符串是否为空:" + s1.isEmpty());
            System.out.println("判断两个字符串是否相等:" + s1.equals(s2));
        }
    }
